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circuitbasics :আইচি বোৰৰ পিন কেনেকে উলিয়াবা

Open up a television or a radio and you'll see many parts that it's built around a printed circuit board (PCB): a bit like an electric street-layout with small circuit components (such as resistors and capacitors) in place of the buildings and printed copper connections linking them together like miniature metal streets. Circuit boards are fine in small appliances like this, but if you try to use the same tricks alike to build a complex electronic machine, such as a computer, you quickly hit a snag. So to get the best of the small space IC or integrated circuitLets learn how to get the pins to follow a circuit diagram This is 555 EGG timer it will shut off egg heater after time delay or it will BUZZ Lets find the pins of the IC ! 555timer টোৰ পিন দেখাইছো , কাত তোৰে বাওঁপিনে ১নং পিন ... তাৰ পৰা ২,৩,৪...একে দৰে CD4017(runing led IC) টোত পিন দেখিবাlink:http://www.electronicecircuits.com/wp-content/uploads/2010/11/CD4017-Counter-Divider-pin-Configuration-4017.jpgকেতবোৰ আইছি দেখাত like Transistor ExampleUM66 : ( keeps jingle bell music )http://spolearninglab.com/curriculum/images/summer/2013/sound/musical_alarm/um66-dsaf.jpg

you said Joule Thief? you said Joule Thief? It’s a little wisp of a circuit that allows you to drive aPOWER LED from a low voltage. Normally, if you want to light up a blue or white LED you need to provide it with 3 – 3.5 V, like from a 3 V lithium coin cell.But the magic of JT is a 1.5 V battery like a AA cell simply will work. Easy make Joule Thief, works like a charm. Not only does it work with a brand new battery, but it works until the battery is nearly dead– down to 0.3 V. That’s well below the point where your other toys will tell you the battery is dead, so it can steal every last joule of energy from the battery (hence the name).how about a cellphone charger , yes it is doable , we are here to give you a usable tested diagram .get the ring toroid from a OLD smps of pc !